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Sewage treatment equipment in environmental protection field
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Efficient and environment-friendly sewage treatment device
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High-efficient environmental protection sewage purification treatment device
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Water agent intensive mixing device for sewage treatment
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Preliminary impurity filtering device for sewage treatment
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Control valve of aircraft carrier ejector
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Clutch for aircraft carrier catapult
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Landing deck of aircraft carrier
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Aircraft carrier catapult
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Self-engaging starter
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Small-sized digital keyboard adapted to Chinese phonetic input
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Telephone set or mobile phone keyboard marked with phonetic transcription
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Cooking fume exhauster
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Environment protection type pencil
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Rotary pendulum piston planet engine
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